The stopband zero suppression is a stricter design constraint than the vanishing moments, and can more effectively manipulate the stopband characteristics of filters.
阻带零点抑制是比消失矩约束更为严格的设计条件,能够更有效地控制滤波器的阻带特性。
A cascaded SINE filter is introduced after the COSINE one which improves the stopband characteristics to compensate the passband drop.